Michael Waltrip Racing makes it official and releases David Reutimann

Michael Waltrip Racing made it official on Thursday -- David Reutimann will not be back in 2012 in the No. 00 Toyota.

"David has been a significant part of Michael Waltrip Racing since the very beginning and will forever be a part of our heritage," Waltrip said in a statement. "We want to thank David for his contribution to our growth and success over the past five years and wish him well in the future."

Reutimann has two wins, 12 top-fives, 25 top-10s and won four poles in 168 Sprint Cup starts for MWR.

Reutimann has been sponsored by Aaron's, which also sponsors the spring Talladega race. It is expected that Mark Martin will move over from Hendrick Motorsports to MWR to take over on a part-time basis. MWR has scheduled a press conference for Friday at Texas Motor Speedway.